I'm trying to set Gentoo up on a machine with only a wireless network card, the Intel Wireless-N 7260, which uses the iwlwifi driver.

The latest minimal-install disk (booted over usb) contains the 7260 ucode and it is present in /lib/firmware/. Running "modprobe iwlwifi" loads the module, but no new network interface seems to pop up (which is, I guess, not surprising seeing how modinfo doesn't seem to have access to the right firmware).